It was almost 100 years ago that Clyde W. Tombaugh discovered Pluto. That was the last planet found until 1992, when humans found another one. But this new planet wasn't in our solar system—it was ...

Alpha Centauri, one of the two "Pointer Stars" that help stargazers find the Southern Cross in the Southern Hemisphere, may have a planet in orbit around it. If it does, the Webb Telescope will find ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. Illustration of the Earth-like exoplanet Proxima Centauri b orbiting the star Proxima ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the edge of our solar system, evading all our efforts to spot it. Some astronomers ...

WASHINGTON, June 4 (Reuters) - Astronomers have spotted a cosmic mismatch that has left them perplexed - a really big planet orbiting a really small star. The discovery defies current understanding of ...

Astronomers have captured some of the most detailed images of debris discs—rings of leftover dust, gas, and rocks that circle a star—from fully formed, "teenage" planetary systems. And those images, ...

The Solar System does not have a clear border. The influence of the Sun in certain domains is small enough for the Voyager probes to have escaped into interstellar space, but there are comets and ...

Scientists believe our solar system may be hiding a secret world — and it’s not the famous Planet X :eyes: A new study suggests an Earth-sized rocky planet, nicknamed Planet Y, could be lurking in the ...